US3350488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of sharp-edge fibers
Assignee: EIDP Inc
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Filing: 1965-03-03
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Granted: 1967-10-31
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Expires: 1985-03-03
Abstract
No abstract record available.
Inventors
- 👤 Breen Alvin Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:14
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; Y; Y10; Y10S; Y10S264/00; Y10S264/47; Y10S57/00; Y10S57/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD OF MAKING SHARP-EDGED FILAMENTS WHICH COMPRISES SPINNING A COMPOSITE FILAMENT OF SUBSTANTIALLY UNIFORM CROSS-SECTION COMPOSED OF SEGMENTS OF AT LEAST TWO DISSIMILAR SYNTHETIC POLYMERIC COMPOSITIONS, SAID CROSS-SECTION HAVING AT LEAST TWO SEGMENTS OF AT LEAST ONE OF SAID POLYMERS, ANY CONTACT BETWEEN SUCH SEGMENTS OF THE SAME POLYMER BEING SUBSTANTIALLY POINT CONTACT AND SEPARATING A SHARP-EDGED FILAMENT THEREFROM.
Claim 2
Independent Claim
60 words
A METHOD OF MAKING SHARP-EDGED FILAMENTS WHICH COMPRISES SPINNING A COMPOSITE FILAMENT OF SUBSTANTIALLY UNIFORM CROSS-SECTION COMPOSED OF SEGMENTS OF AT LEAST TWO DISSIMILAR SYNTHETIC POLYMERIC COMPOSITIONS, SAID CROSS-SECTION HAVING AT LEAST TWO SEGMENTS OF AT LEAST ONE OF SAID POLYMERS, ANY CONTACT BETWEEN SUCH SEGMENTS OF THE SAME POLYMER BEING SUBSTANTIALLY POINT CONTACT AND SEPARATING A SHARP-EDGED FILAMENT THEREFROM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |